The pupusas at Los Planes are delicious, but you really have to go to Olocuilta for the very best (and the better experience). Essentially Olocuilta is town of 50+ different pupuserias, each putting out a slightly different version of Pupusa. While they do specialize in rice pupusas, they all also make the traditional corn variety. You can tell them which filling you want (typically: queso, queso con loroco, chicharon, frijoles, frijoles con queso, revueltas [everything], and sometimes squash blossom) which dough you want, and they'll make and griddle it on the spot. Served with giant plastic jugs of curtido (pickled slaw), it's a great gustatory experience. Favorites in Olocuilta include:Pupuseria Abrego, Pupuseria El Manguito, and Pupuseria El Tejano